Cableizer

Factor of mechanical neutral line

For n cores arranged symmetrically, the circle centered at the origin that bisects each core's area is the neutral circle of diameter $r_{neutral}=k \cdot r_{core}$

The value for three-core cables is actually 1.2937 but we use the value 1.29 from CIGRE TB 880 to prevent deviations in the results.

Symbol
$k_{core}$
Formulas
$1$two-core cables, round conductors
$1.29$three-core cables, round conductors
$1.6072$four-core cables, round conductors
$1.8744$five-core cables, round conductors
Used in
$D_{lay,core}$
Diameter of mechanical neutral line [mm]